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Frank V
Asked: 2015-09-22 12:26:11 +0800 CST

Conditionals in cmd scripts

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I'm doing scripting using appcmd. What I'd like to do is check to see if a given site exists and if does perform an action. In this case, delete it. 

appcmd list app | find "mySite"

So, if the find "mySite" returns any text, I'd like to execute a delete statement. Now, I understand I could attempt to delete the site and ignore the error but that gives a (potentially) confusing output.

I've tried something like the following, where I assume I'd just use the variable appExists in an if statement, but it just ends up blank. Alayways.

set appExists=appcmd list app | find "mySite"
echo %~n0: %appExists%

How can I achieve this?

command-line-interface

1 Answers

  1. You could do:

    for /f "delims=" %%f in ('appcmd list app ^| find "mySite"') do (
    set appExists=%%f
)
echo %~n0: %appExists%

    But then you could skip setting an environment variable and adding an if test, and build the removal into the for loop:

    for /f "delims=" %%f in ('appcmd list app ^| find "mySite"') do (
    rem appcmd whatever whatever remove %%f here
)

    (And check the for options (for /?) to use the delims= and tokens= to get whichever part of the line you need directly).

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